The Honolulu Marathon is the fourth largest marathon in the US, taking place each December. There is no time limit and the course is pretty flat except for one hill to go over twice.
The course goes through downtown Honolulu, past Iolani Palace and the Christmas lights, through Waikiki and climbs up and around Diamond Head, before heading out through Kahala and out to Hawaii Kai. Turning back after Hawaii Kai toward Kahala and Honolulu, the course passes Diamond Head again on the ocean side before finishing in Kapiolani Park.
Views along Diamond Head